2002 Chevy Tahoe 5.3L V8 264k miles HPL BAS 5w-30 5k miles Heavy duty use Fram Ultra XG9837 oil filter ACDelco air filter This is my first sample of this oil. High Performance Lubricants Bad [censored] Racing (BAS) 5w-30. I decided to use this oil just to see how it would work on the street since it is formulated as a dedicated racing oil without much consideration for street use. I don't think it did too bad. Just over half of the 5k miles were towing between 4-6k lbs. I also tow in 3rd gear so the rpm is 2500-2800 down the highway. The virgin sample showed 26 ppm Si, 19 ppm Na, and 15 ppm Ni. Some of the "wear" and "contaminant" metals are part of the add pack. I'll probably change it at 7,500 miles.